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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '80e2cca4c9530d4d94d8d39f05af4ebf63f0e1408a9db0c527a9fb77d7dcd3cf' 
  AND token = 'OWlWblWGpPq2+FuE6zI4S3L9GUWZh5BfaqPd0YMHrpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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