Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a716428b14a7954a5e022cd0b2b31bd5743d2094f02eede10436080c29a70c9d' 
  AND token = 'wRj7rUprz4NsFA53YaieI6b+LUfxyFWr5nGE70LlU60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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