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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '27d213ec613e610a14f34833c91e7f788b33d1b615d87e3e67a71f130840c4ea' 
  AND token = 'UlsRhZ3I/h57vD1/bR7qeh01H1EjipoaOw6pngEBfrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00007

JSON explain

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