Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1c8caf37be51c92551a25b95dafb3e03292d48974f77d65e6d77d7ac781dc8e' 
  AND token = 'KrK5R/6oI1qgrJgPTwDA1GKF15HR+Y31Tr9rMLX+/tE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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