SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d49dc94045d322bc0834a297dff9b5263ff2934530fce10b8adc4cfdee541b3' 
  AND token = 'j57sG5IQ80Z5NzUJgybTkV4OIW5K8OYiWp/B0OoYH3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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