SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '113f47fde7a4fbdfa0d3e6fdc217a3f8f8dcdc8b5841f33b2810ef14a990a47a' 
  AND token = 'iyDLt0w7MgJGjJW8Hvv26MxPRsW/qQV/kXYvXQ6Udsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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