Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc17802c3b37a6e42d434705bdf6c19abe4212b53941e5eccb1c64e621012f0' 
  AND token = 'E//o1vU8eI07NLB9kecPvCGRvg28nFoKyGvvEWbN+VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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