Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0149939636d67de09c5be16980df57adf1a770a7a190f790dd17f1907178707e' 
  AND token = 'uOWVpGDLkxqbjRZ180JVoIZmoekLM1jL/N37grusGGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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