SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9128f186c2f60b86697ae4e6ba9427b92a3cd505ee27249ba401aca5dd6d40f3' 
  AND token = '/mHkT83d6irHc+gYjohlGIBPK+01fuS0gLcQibDRhmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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