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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ed935cb0609bdcdf3d8f2bd13aa2d8cdec2123ace17cb7aac8060cbac2e0e3f' 
  AND token = 'NCKlEba6Bl/n8lqsU0LwD4d0Y0vz2+ilCERKM4YkbX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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