SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22185701d39ef1e071bca2565e5035d318d52efc73bdc436f5f40d4be782d3b9' 
  AND token = 'wy6Vw5B5YhxZP/HXpGwx4+5t3INZjwBIM0a0c5Dx2Vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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