Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '264335d27a979d0229eb1163bbf6de63dac3e37d5a8e555a2b7f77d1359f4e9b' 
  AND token = '3S3SmVmkdjU0gHEfEpjqelEJE3TWBudL5moZcdbHI2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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