Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06a56ff08819ca18aa3a1c82c3d54a9819385b87373ecc38d3675a59224e0b5a' 
  AND token = 'yIxpcmMzfz4J3chFr7zrRIi9PA2CkCQvLhGNEuSl4qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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