Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b668210a1e0e7565979923e8d4ce3f8b4b337ddb4aa33323340deb241d06888d' 
  AND token = 'ovdlewQ4DFEpt1nzFIbrpWIq/S5gCmcHYZqRqxquDcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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