Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '390c1c85494f0b533a8e778afa3e945bdfd6c3d636f34afdd39c424258d2c2cc' 
  AND token = 'WDHIyN5aQrh9PGxNotvn7xtrbYIITuHGeIHLwpWQZV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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