Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '858ae2ea75e2d23b7c1f4decc1efddfd7a66716ff247cccddceaf8ed0bfd58a2' 
  AND token = '+rT1ra7MBbtFMGKuNo4B243J8yKEEAUn4ovt5YsAmnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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