Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ebcee1487870bb8da0c2a54ac790572afaaf5a6f3664d94e05ab7da80b7efbc8' 
  AND token = 'quqvTuE3wTjNvV3CXTtTxs8dNrVKR/1sRQbQPARQgfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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