SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3510c4af9a74787da6b651a5bc37bc5e55b35ef6cf36730140db2facc8391094' 
  AND token = 'HGqzVlNAm1ClHXp3uBhcQIGjUpGT32Kv59oSKOhvHS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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