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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e01b459308d5dbd3ac21c9c998e8504322188456544ca25f3049e5a423ac932a' 
  AND token = 'QCBWeqHsOGq+FLagczyo3Xdb5N7isbqEH8jToodbfv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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