Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f81f85afca92406aee696bf9b922737975ca0210122036b985df6bbb613f66e' 
  AND token = '2BDmX38oL9uWYh/y45gNkQOUkc2AmRNFnf2r1WaafMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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