Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7e3a113e1ef5b72173853a278f90f2c7022bb87ec22bfeec5f739cda9ac02ee' 
  AND token = 't+aiH4CBRJpkqR4GuE3bMlECshBpHSoYgoFTMzuSr3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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