Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa048b18c4fa4c292ec292c62a967d4c126cad1ad5ba344f43d0afaf24520ecb' 
  AND token = 'jhv4wrDuICpT11dVajhycf2xwDby4lb/TuqBDXdLjp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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