Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7d69189e243aa4e5725d81aa07e6d1e012dbcf2bbe7f482ce5072280ca6c502' 
  AND token = 'pVZ5uNVeat0gTQMa4qmpUch9HD2CZ66CGXapeDAEp3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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