Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfdbe37d0b0a614dd733a6a80cb1525d73fbb78203d39927f4a5927bf312ba54' 
  AND token = 'gHtT3fYYgKI+rXL0xPVfeYRdg+LWHIsP5Sugrp410Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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