Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c1028fde08515807709bc0c163f698875d911ff21caab086419c86ecbb2cde5' 
  AND token = 'A6k9PVzBiFerEIrubOU/8snpwTqro4dJ0wivj/W0ovg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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