Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62d718e1c171d33ecc6eeaa1c8b20c1aa6e83021d82f7a6964acab80c4965e58' 
  AND token = 'jL/xX3Q259qa45+m/UK6kTj24ZISkMSKkAnnCQFFwt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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