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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd7b474dd2812444f351c8d076416aa4d8eefe45315083b375a202f757484bbb5' 
  AND token = 'Ulko0poKp+zNVApZRluuf/28Tmk8P0mZ9P4SXSFDypU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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