SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9e4514c893c24904f02a94f94e1906a4aeb7e0fa4ab92e4551fbf81190de680c' 
  AND token = 'BMX8tlpES6DCiUcBgLLZAHHiuTYg/h7qFHBGCL3rTwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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