Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7b3808691b28113244b12122b16d79ac0e3ad4e7f950306913c0e223165b7e8' 
  AND token = 'jRoJQHz/0tObcVgZRo650WQMlVTwbc2z4op1a+D+wRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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