Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea7815fff5a986e70d7794ef0c11144561af3bda91aa889c402947f80d22ad6f' 
  AND token = 'caiGqDUnWokygvhdjPZ47NwxnnTza0G16amIg9AK+5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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