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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '19743b93b36dd53278ba8d0d67df36817b957b665d35e41dad9e6c35dbe7ae10' 
  AND token = 'yYCJI2y8/J+Do2G5uuKBWI+kgn7wPe5geEGxYwjsOWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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