Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0182f3e27ef5826879226fade20a448d137551a5e4742159ee4d351de82e43c1' 
  AND token = 'o3daWH2VV81ZYN0AWDEG3LlBSNUEBrLhI8t5VMYtREg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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