Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8edc2f4e9da36082b8afc4e21036b291b25b656debb76ea270837066103eb7cb' 
  AND token = '7gcAvvrMTcTIE1R4g+ym+WGclyiDumC6s4dndlumK9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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