Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80ebb7c3c7616dedef6fb3f432904cdaeacfd6f1cc7eb910ac1c9f9251263ecf' 
  AND token = 'jUTT0WBAHjhbmK2Umo+LAUNMEFJotUTzQ6x7kPPGXx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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