Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e96a382f869a5a6242f9826d3cf052fad06bde3f0e700ed91f5d0c690dc9f44f' 
  AND token = 'c91KPMjhcRxQohgQ2QODpe5qMdAWzkG066N2LgOAfCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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