Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65213f2e13c7f6d779c9f68f23e4874db3383004fdc0df1e43fa0341a0b54d11' 
  AND token = 'rNSJqX6dcWRDLWJDvycCQp2N3ldE5YfZHtiqRaZvRLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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