Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1c9ca914a3a480441f447b1bb43eb125ac1aa17517c231d740c09b8ba6b22c8' 
  AND token = 'yFNsGCNnZ6YwsOA3M0YJqTTIJcDwJA7kL1vaETpN1Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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