Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fab8fb764bd344d2a6d2376aca7940bd58e7cddc90d6487c69e9e9de0a9e3c7c' 
  AND token = 'wdzfVEoZHYI+KZ4JQUq2PoeBreuBr6Ex1dPV9NGKRKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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