Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aff290624c011b9a694fe8eaab8134d2e49ba962f6f9bbfaa9f1bd45333995b0' 
  AND token = 'sPI2Hx6HPVmpTT+7mFJRSzmg0bNrRUOCpLsjnMcJLB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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