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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'dee7337412e89b3acd0e37cae8cd878003a1221e0e6d92b0ca0f7531b540ffce' 
  AND token = 'f7ML2ZowMhcrJYDA3lRi6c/SijU3fviOUzGs6hK6tQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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