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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd9a4aa2482641d99357262f1e9bae6dbc90d7ae1060c4a1fc8ff19605700b967' 
  AND token = '2JNW6MeyRiVsz8wNBvqPIiW5np8Wh/cThQg0NSJ95jU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}