Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4144f4f5e7017aeb886dece9976476fd66309742c40b2dfd371ff03721de38d0' 
  AND token = 'scCmIvHIBYI4nyySrmXn/UT3IC598HfxO1Dd9I127Ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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