Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4beff74629f1323935dda98c83489e25dbbfc5953c6484b6eee79704a631dcac' 
  AND token = 'uhCJA3/Lj9+d1LeKeK5AUwX2cl1mJFLvG9dKSruVkvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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