Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e032d7850df742506ab36724c91bf0d4f7ba687e9d69015e7cfcb1efca94e938' 
  AND token = 'CP138DX2xt8P+437gseFqqhDXNbCP6kA+7rta4v1hiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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