Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b13cb74a40460a8601d5ff2400da39383bb9bf716e0e174de9ed04036b673ae8' 
  AND token = 'VH68wcgBlj+BSTtK501clfHLPQl5beKsfJ80uu9MlEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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