Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93b251ba4aea9e0137ab5f8955470c6caac97dcc8094c926de18ee74ffa80f75' 
  AND token = 'YBQ82PvMEM7R3z5ak5G4oBDwuy8ak7dvpA8JAGhd9tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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