Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8af3c327a4edeb91ec78f0194d80a7b804ef722c8891958fb075da13efa6ddba' 
  AND token = 'bdGYfJHEPqzDvbD2/a/wWxNE3xoeDhkKTC2Mk6jXZZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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