Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b673b4d1facbbaaa89d30c88b6d0d7c320a31dead07e93e00c534e77185cf89' 
  AND token = 'o+nt+AiL5nWZ7EIshkZKxOZJV3uGbKWnOiir/15vGfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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