SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'afebe57c0b83192ca5452c064dd9fe4bd4fae7f78f3f08722886a86b04e1c110' 
  AND token = 'CpjLavZ1gTkOTVOieqThXwgj3nrQAIvs3WJueXSuFSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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