Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ce04d18acb92be5d0c930ba65829d970792136bf6786a09c2af4f7ef6afb9ba' 
  AND token = 'ghff5NCdmX/w9NyYewhh+CKUsFZ8bsY8M2iOB+0bxmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}