Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '159184f67f0b6750779519ab206e8a73eff7712094e036b4a05defc95ab97280' 
  AND token = 'VUxvvDm/l4FBe4paDiYmtSY52n6VfhZ2SMfaJir88vY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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