Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c6ffc7857f9be44cc7304489c3afcfe1dc2e7c4205398047987bed20e28a208' 
  AND token = 'yrVuuDSKzdiwzwSFIOTIfs/17C9hmpRu6blHl14WAKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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