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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '074acb6c7430da69c5ac7fec84e1454cfaf7f2f3fd6ce4ef7d5c3939e3414163' 
  AND token = '8AWzw333WrnQ96zn6LEOh9Nb9hJBPI8FfD9hAh05PU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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