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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fdfc77be67d7104f31e1ea7da56cd01b3ec4eccdc884c17d5c6daf85ed0938a4' 
  AND token = 'NCJJoVY8GtB8qrvkKt7BRZvIRSpBcZjjJdUaZo719WU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}