Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31fcd682b5563db6c5156e3c95446d3aefd66caca55855ac4a95384248d0e964' 
  AND token = '9UeMxb+h3Wc1CF8XtzhIA4kgCY49BECm18eWMoC5API=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}