SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c32c274b08a877794048d8814f2938805237ff651fc7503a9c516e654167eb5' 
  AND token = '1Whnk+twbJdQnSDqSPGUHcmL4im0oPHuuY4UsO6pSkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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