Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b66e03609f5f19a332d9652ed69c8ce0d138376b8c849253b96115a3bbcaf5ab' 
  AND token = 'rkat75QxPMpRGKqg0GZ7yaPKmAXYQbLFe4hnYZt6rCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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