SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3006d7031e4185f1f01302fb7346e4eb49fa7e64871b631d42c905108412d7b2' 
  AND token = '7jlNoLt4JIyQ/GA1LUm9u5ILyjuGXZC6pKu8oKTgLVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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