Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f078c83b9b9c25277eca42eb3945c298459719145f7fe7ddc124d07864582803' 
  AND token = 'GXDA7oqsnB3sjVyn/NhsWphf8BT4LynUckcgW9K0E6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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